Figure F9. Long-core measurements of (A) the intensity of the remanent magnetization after partial demagnetization (20 mT) compared with (B) the composite paleointensity record (virtual axial dipole moment [VADM]) in the equatorial Pacific (Valet and Meynadier, 1993). Although the natural remanent magnetization (NRM) data are not normalized, the comparison suggests that the periodicity observed in the NRM record for the upper part of the Brunhes may be caused by ambient field variations.